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A substance that repels or averts another. Hydrophobic materials, such as oils, fats, Rubber, Wax, Silicone, and Teflon®, are water-repellent. Some chemicals, because of their smell or taste, repel animals and insects. For example, mosquitos and ticks are repelled by citronella, dimethyl phthalate, DEET and 2-ethyl hexanediol-1,3. Rodents are repelled by actidione, thiuram disulfide and Hexachlorophene. Traditional mothballs containing Naphthalene have been replaced by other volatile repellents such as 1,4-dichlorobenzene. Moth larvae development can be inhibited by natural products such as Permethrin or Neem oil.


bug spray


  • Permethrin is toxic to cats

Resources and Citations

  • Wikipedia: Pest (organism)
  • Wikipedia: Insect repellent
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

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